Date: Fri, 05 May 2006 08:10:49 -0500 From: Eric Anderson <anderson@centtech.com> To: Attila Nagy <bra@fsn.hu> Cc: freebsd-hackers@freebsd.org, Scott Long <scottl@samsco.org> Subject: Re: Core Duo - only one cpu being used Message-ID: <445B4ED9.6020607@centtech.com> In-Reply-To: <445B4D2D.8070502@fsn.hu> References: <445AB56F.8090907@centtech.com> <445AC174.5050102@pacific.net.sg> <445AC46F.30702@centtech.com> <445AD048.80305@pacific.net.sg> <445AD1AC.1070902@centtech.com> <445AD300.1020808@pacific.net.sg> <445AD50B.2060107@centtech.com> <445AD6B4.7050407@pacific.net.sg> <445AD83A.7090607@samsco.org> <445B4D2D.8070502@fsn.hu>
next in thread | previous in thread | raw e-mail | index | archive | help
Attila Nagy wrote: > Hello, > > On 05/05/06 06:44, Scott Long wrote: >> CPU1 is being treated as a hyperthreading core instead of a real core, >> and is being disabled per our policy on Intel hyperthreading. By >> 'disabled' I mean that it is started, but it is being excluded from >> scheduling decisions, and thus is only running its idle proc. It's >> also handling any interrupts that come to it, such as timer and IPI >> interrupts, so it's at 99% instead of 100% for the idle proc. There >> is nothing broken about the number you are seeing, your system is >> just running under a scheduling policy that it should not be. >> >> This should have been fixed a week or so ago by a commit to HEAD, >> RELENG_6, and RELENG_6_1 by Colin Percival. How old is kernel? > Isn't this fixed by jkim's commit? > > I don't have any Core Duos here, but on a Xeon LV (Sossaman) with > CURRENT, everything is OK: > http://www.freebsd.org/cgi/query-pr.cgi?pr=96203 > > BTW, just set machdep.hyperthreading_allowed=1 until the fix arrives. > I can confirm now that it is fixed in todays 6-STABLE. Thanks everyone! Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?445B4ED9.6020607>